> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/harness-ai/use-harness-platform/references/harness-entity-reference.md).

# Harness entity reference

The term entity is used to refer to the components of Harness.

The term entity is used to refer to the components of Harness. Most entities can be created at the account, organization, and project level.

#### Examples of Entities <a href="#examples-of-entities" id="examples-of-entities"></a>

Here are some example of entity types in Harness:

* Account
* User
* Users Group
* Service
* Service Definition
* Environment
* Infrastructure
* Infrastructure Definition
* Pipeline
* Connectors
* Secrets
* Secret Managers

#### Entity Identifiers <a href="#entity-identifiers" id="entity-identifiers"></a>

Most Harness entities and resources include a unique Id (Identifier) that is immutable once the entity is created.

Identifiers provide a permanent way to refer to an entity, and avoid issues that can arise when a name is changed.

See [Entity Identifier Reference](/harness-ai/use-harness-platform/references/entity-identifier-reference.md).

#### See also <a href="#see-also" id="see-also"></a>

* [Entity Identifier Reference](/harness-ai/use-harness-platform/references/entity-identifier-reference.md)
* [Entity Retention Policy](/harness-ai/use-harness-platform/references/entity-retention-policy.md)
* [Entity Deletion Reference](/harness-ai/use-harness-platform/references/entity-deletion-reference.md)

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